JP5584568B2 - Bed apparatus and back raising mechanism of bed apparatus - Google Patents

Description

  The present invention relates to a bed apparatus and the like.

  Conventionally, in order to make it easier for a user (a person being assisted) to get on and off the bed apparatus, or for an assistant to easily assist a person who is being assisted, a lifting mechanism for raising and lowering the entire bed apparatus, a back raising mechanism, and a leg raising A bed apparatus having various operation mechanisms such as a mechanism is known.

  In these bed devices, each mechanism uses an electric actuator or the like as a driving device, and by using the function of the electric actuator, it is possible to realize an operation of raising the back or raising the foot. It becomes.

  Here, as a back raising mechanism, one using a link for limiting the back raising locus is known. And, in order to reduce the feeling of displacement and pressure in the case of raising the back, a product in which the back bottom is configured to be retractable, that is, a bed apparatus that escapes the head side upward during the back raising operation is known (for example, Patent Document 1).

JP 2007-68724 A

  In recent years, the bed apparatus has been used not only in hospitals and facilities but also in ordinary homes due to the spread of home care, for example. In such a case, it was necessary to reduce the number of parts in order to reduce the size and weight of the device.

  However, in the case of the above-described product that retracts the back bottom, the stroke of the electric actuator becomes large, and there is a problem that the apparatus cannot be reduced in size.

  In addition, in order to reduce the stroke of the electric actuator, a method of combining a plurality of electric actuators can be considered. However, the number of parts is increased, and the cost of the bed apparatus is increased, and the maintainability is lowered. was there.

  In view of the above-described problems, an object of the present invention is to provide a bed apparatus or the like that can realize a back-up operation with a small number of parts without increasing the stroke of the electric actuator.

In view of the above-described problems, the bed apparatus of the present invention is
A bed frame, and a back bottom that is supported by the bed frame and that can be driven upside down,
A link mechanism for tilting the back bottom;
A driving device disposed on the lower surface side of the back bottom and operating the link mechanism;
With
The drive device is characterized in that one end is rotatably attached to the back bottom and the other end is rotatably attached to a link mechanism.

In the bed apparatus of the present invention, the link mechanism is
A first link having one end pivotally attached to the first position of the back bottom and the other end pivotally attached to the second position of the bed frame;
A fourth position where one end is attached to a third position outside the first position of the back bottom and the position where the driving device is attached, and the other end is located inside the longitudinal direction of the bed frame from the second position of the bed frame A second link attached to the
Have
The drive device is characterized in that the other end is rotatably attached to the second link.

The back raising mechanism of the bed apparatus of the present invention is a back raising mechanism of the bed apparatus including a bed frame and a back bottom that is supported by the bed frame and that can be driven up.
A link mechanism for tilting the back bottom;
A driving device disposed on the lower surface side of the back bottom and operating the link mechanism;
With
The drive device is characterized in that one end is rotatably attached to the back bottom and the other end is rotatably attached to a link mechanism.

  According to the present invention, a bed frame, a back bottom that can be driven upside down supported by the bed frame, a link mechanism for tilting the back bottom, and a lower surface side of the back bottom, the link In the bed apparatus provided with the drive device for driving the mechanism, one end of the drive device is rotatably attached to the back bottom, and the other end is rotatably attached to the link mechanism.

  As a result, when the back bottom is raised by the back raising drive, the link mechanism connected via the drive device is also raised. Thereby, even if the stroke required for the drive device is small, it is possible to appropriately perform the back raising operation.

It is a perspective view of the bed apparatus in this embodiment. It is a front view of the bed apparatus in this embodiment. It is a bottom view of the bed apparatus in this embodiment. It is sectional drawing of the bed apparatus in this embodiment, and a back raising mechanism part. It is sectional drawing of the bed apparatus in this embodiment, and a back raising mechanism part. It is a perspective view of the bed apparatus and back raising mechanism part in this embodiment. It is sectional drawing of the bed apparatus in this embodiment, and a back raising mechanism part. It is sectional drawing of the bed apparatus in this embodiment, and a back raising mechanism part.

The best mode for carrying out the present invention will be described below with reference to the drawings.
[1. Configuration of bed apparatus]
First, the whole structure of the bed apparatus 1 of this embodiment is demonstrated using FIGS. 1 is a perspective view of the bed apparatus 1, FIG. 2 is a front view of the bed apparatus 1, and FIG. 3 is a bottom view of the bed apparatus 1. Here, when the user of the bed apparatus is lying on the bed, the head side will be described as the H direction and the foot side will be described as the L direction.

  In the bed apparatus 1, a bed frame 3 is supported on a carriage 4 so as to be movable up and down through two lift link mechanisms 6 on the head side and the foot side. The bed frame 3 has a configuration in which a plurality of frame members in the width direction are provided between the frame members in the longitudinal direction.

  Further, the bed frame 3 is provided with a bottom 2, and as the bottom 2, a back bottom 22, a waist bottom 24, a knee bottom 26, and a foot bottom 28 are sequentially divided from the head side to the foot side. .

  The back bottom 22 is installed on the bed frame 3 so as to be rotatable about the waist bottom 24 side, and the knee bottom 26 is installed on the bed frame 3 so as to be rotatable about the waist bottom 24 side. The waist bottom 24 is fixed, and the foot bottom 28 moves up and down in conjunction with the rise and fall of the knee bottom 26. Usually, the mattress is placed on the bottom 2.

  Moreover, the wheel 5 is arrange | positioned in the corner vicinity of the trolley | bogie 4, The trolley | bogie 4 (bed apparatus 1) can be moved now in arbitrary directions.

  Further, as side rails 7, side rails 7 a are provided on the left and right sides of the back bottom 22, and side rails 7 b are provided on the left and right sides of the bed frame 3 along the longitudinal direction. Here, each of the side rails 7 has a rectangular (substantially rectangular) shape, and can be folded and stored below the bottom. A headboard 8 is provided on the head side, and a footboard 9 is provided on the foot side.

  The bed apparatus 1 is provided with a plurality of electric actuators as drive devices according to the movable part. For example, in the bed apparatus 1 in the present embodiment, electric actuators 31, 32, 33, 34, 35, and 36 are provided.

  For example, the back bottom 22 is operated by the electric actuator 31 (so-called back raising operation), and the bed apparatus 1 can be moved up and down by the electric actuators 32 and 33. Further, the knee bottom 26 is operated by the electric actuator 34, the foot bottom 28 is operated by the electric actuator 35, and the foot board 9 can be moved by the electric actuator 36.

  Moreover, it has the control box 40 which stored the controller for controlling each electric actuator. The controller in the control box 40 deforms the bed apparatus 1 by controlling each electric actuator based on an operation instruction input from the outside.

[2. Description of back raising mechanism]
Next, the back raising mechanism in the bed apparatus 1 of the present embodiment will be described with reference to the drawings. FIG. 4 is a cross-sectional view of a portion of the back raising mechanism, showing the back bottom 22 in a horizontal state, that is, a case where the back raising angle is 0 degree. 5 is a state in which the back bottom 22 is raised, that is, a state in which the back raising angle is approximately 30 degrees, and FIG. 6 is a perspective view for explaining the back raising mechanism. 7 and 8 show a state where the back bottom 22 is further raised, FIG. 7 shows a state where the back raising angle is about 60 degrees, and FIG. 8 shows a state where the back raising angle is about 80 degrees.

  Here, the back bottom 22 is configured to be tiltable by the bed frame 3 and the link mechanism. The link mechanism in the present embodiment is mainly composed of the link 104 and the link 106, and includes the rotating shaft 108 and the link 110.

  A pair of links 104 are formed on the left and right sides of the back bottom 22 in the width direction, and the upper ends thereof are pivotally supported by the lower portion of the back bottom 22 so as to be rotatable about a fulcrum 202. The lower end of the frame 3 is pivotally supported around a fulcrum 204 near the head side of the frame 3.

  A pair of links 106 are formed on the left and right sides of the back bottom 22 in the width direction, and the upper ends thereof are pivotally supported by and connected to the rotary shaft 108. Further, the lower end is pivotally supported so as to be rotatable around a fulcrum 208 on the foot side (that is, the inner side in the longitudinal direction) from the fulcrum 204.

  That is, the link 104 is longer than the link 106, and the attachment position is located on the head side (H side) from the link 106.

  The rotation shaft 108 is spanned perpendicularly to the back bottom 22 at a fulcrum 206 and is connected to the link 106. A link 110 is fixed to the rotary shaft 108 near the center, and a piston rod 31a of the electric actuator 31 is rotatably supported around a fulcrum 210 at the lower end of the link 110.

  That is, the link 106 and the link 110 are axially supported on the same axis as the rotation shaft 108. As a result, the link 106 and the link 110 rotate in conjunction with each other. For example, when a force that rotates the link 110 counterclockwise is applied, the link 106 also tries to rotate counterclockwise. Here, since the fulcrum 208 is fixed, the link 106 exerts a force to push up the back bottom 22.

  In addition, an electric actuator 31 is rotatably provided on the back bottom 22 via an attachment member 102 provided on the lower surface of the back bottom 22 and is pivotally supported. The base of the electric actuator 31 is pivotally supported by the mounting member 102 and is pivotally supported by the link 110 around the fulcrum 210 at the other end (the end of the piston rod 31a). Yes.

  Here, since the electric actuator 31 is well known, detailed description thereof is omitted. However, in general, a motor is built in, and the piston rod 31a is advanced and retracted from the cylinder by forward and reverse rotation of the motor. To do. The electric actuator 31 is controlled by the control box 40. An operation signal is input by the user via the operation unit, and the operation signal is input to the control box 40. And it is input into the electric actuator 31 as a control signal, and a piston rod advances or retracts when a motor operates. As a result, the bed is raised or lowered.

  As described above, the motor for moving the piston rod 31a forward or backward on the drive side is configured integrally, and the end of the operation shaft of the crank handle for power failure operation is provided at the end on the drive side. An operation hole for fitting and enabling the piston rod to rotate is formed.

[3. Operation of back raising mechanism]
Next, the operation of the back raising mechanism will be described. From the horizontal state shown in FIG. 4, the user inputs a back-up operation through the operation unit or the like. Then, the electric actuator 31 is driven and the piston rod 31a is advanced.

  When the piston rod 31a is advanced, the piston rod 31a pushes up the back bottom 22 in a rising direction, and the back bottom 22 rotates clockwise.

  Specifically, since the fulcrum 204 and the fulcrum 208 are fixed to the frame 3, when the piston rod 31a is advanced, the rotary shaft 108 is rotated counterclockwise via the link 110 to which the piston rod 31a is connected. To rotate the link 106 counterclockwise.

  Further, since the back bottom 22 is provided with the links 104 and 106 supported by the fulcrums 204 and 208 at the fulcrums 202 and 206, the back bottom 22 is formed by the joint action of the links 104 and 106. With 206 as the center of rotation, it rotates clockwise to get up.

  Thus, when the back bottom 22 rises, the back bottom 6 performs an operation in which the lower half of the back bottom 6 moves backward (head side) and the upper half rises. For this reason, even at the bending point of the mattress placed on the back bottom 22, the operation is performed without giving the bed user a feeling of pressure or tightness.

  Further, when the piston rod 31a of the electric actuator 31 is retracted, an operation opposite to that described above is performed. That is, the link 106 is rotated clockwise through the link 110, and the back bottom 22 is rotated counterclockwise. And as shown in FIG. 4, the back bottom 22 will be in a horizontal state.

[4. effect]
As described above, according to the embodiment described above, the fastening portion between the back bottom 22 and the bed main body (bed frame) can be reduced, the back raising mechanism is highly independent, and modularization is easy. In addition, it can be expected to increase the number of production method options, such as the ability to produce a back raising mechanism as a unit.

  Further, when the back bottom 22 is raised by the electric actuator 31, the link mechanism connected via the electric actuator 31 is also raised. Thereby, the operation stroke of the electric actuator 31 can be shortened.

  Further, by providing the electric actuator 31 on the head side (H side) of the back bottom 22, it can be advantageously arranged in a layout as compared with a place where there are many structures from the center to the foot side (L side). .

  Further, by providing one end of the electric actuator 31 to the short link 110 so as to be rotatable, an attachment member is not required for the bed frame 3, and a bed apparatus can be configured with a small number of points.

  Further, when the emergency back-lowering lever is arranged, the electric actuator 31 is arranged near the outside of the bed, so that the layout can be easily performed.

[5. Modified example]
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design and the like within the scope of the present invention are also within the scope of the claims. include.

  In the above-described embodiment, the link 110 is fixed to the rotating shaft 108. However, the link 110 may be provided in other positions and shapes as long as the link 106 acts. is there.

  In the above-described embodiment, the description has been given using the electric actuator as an example of the driving device. However, other devices may be used as long as they have the same functions and effects, for example, a sensor built-in air cylinder, You may be comprised by a hydraulic cylinder, an electric motor, etc.

DESCRIPTION OF SYMBOLS 1 Bed apparatus 2 Bottom 22 Back bottom 24 Waist bottom 26 Knee bottom 28 Foot bottom 3 Bed frame 4 Cart 5 Wheel 6 Lifting link mechanism 7, 7a, 7b Side rail 8 Headboard 9 Foot board 31, 32, 33, 34, 35 , 36 Electric actuator 31a Piston rod 40 Control box 102 Mounting member 104, 106, 110 Link 108 Rotating shaft 202, 204, 206, 208, 210

Claims (3)

A bed frame, and a back bottom that is supported by the bed frame and that can be driven upside down,
A link mechanism for tilting the back bottom;
A driving device disposed on the lower surface side of the back bottom and operating the link mechanism;
With
The link mechanism is
A first link having one end pivotally attached to the first position of the back bottom and the other end pivotally attached to the second position of the bed frame;
A fourth position where one end is attached to a third position outside the first position of the back bottom and the position where the driving device is attached, and the other end is located inside the longitudinal direction of the bed frame from the second position of the bed frame A second link attached to the
Have
One end of the driving device is rotatably attached to the back bottom, and the other end is rotatably attached to the second link . The bed apparatus according to claim 1, further comprising a third link that transmits the driving of the driving device to the second link. In the back raising mechanism of the bed apparatus including a bed frame and a back bottom that is supported by the bed frame and can be driven upside down,
A link mechanism for tilting the back bottom;
A driving device disposed on the lower surface side of the back bottom and operating the link mechanism;
With
The link mechanism is
A first link having one end pivotally attached to the first position of the back bottom and the other end pivotally attached to the second position of the bed frame;
A fourth position where one end is attached to a third position outside the first position of the back bottom and the position where the driving device is attached, and the other end is located inside the longitudinal direction of the bed frame from the second position of the bed frame A second link attached to the
Have
One end of the driving device is rotatably attached to the back bottom, and the other end of the driving device is rotatably attached to the second link .